LET-400-RDC primary test equipment

AC Current Test Set up to 2.5 kA with Auxiliary DC Source

The LET-400-RDC is designed to perform most of the primary tests that
are necessary in substations commissioning. It allows to perform with
sufficient power, all the primary current injections to test the proper
function and wiring of all the elements that compose the protection and
measuring section in a substation.

Description

The regulation system is based on a continuously variable
autotransformer (Variac) that supplies to a power transformer that
delivers the high current outputs and isolate the main supply from the
load. A built-in ammeter and a timer gives the information about the
current value and the operation time of the relay or breaker under test.

CHARACTERISTICS

Permanent current up to 400A 1KVA in 4 Ranges.

Built in digital ammeter 0.5% accuracy.

Built in digital timer resolution 1 ms.

Thermal and shortcircuit protection.

Variable AC and DC voltage up to 220V.

Variable auxiliary DC power supply up to 220V.

APPLICATIONS

Test of the I/T curve in primary current relays test.

Primary injection tests.

Test of measurement and protection transformers.

In general, primary injection tests including the complete loop,
such as current transformer cables, protective relays, and circuit
breakers.